Young-Holt Unlimited (also known as Young-Holt Trio), was a U.S. soul and jazz instrumental musical ensemble from Chicago, Illinois, United States. Drummer Isaac "Redd" Holt and bassist Eldee Young,
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0390b6afb2279c2907610a99fbbbd21b7471c4a26a432969c212697c02bf3690. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45baa6a0-d90e-425e-90e5-9e31e482f9fe.json and https://artists.proofprofile.net/proofs/artist/45baa6a0-d90e-425e-90e5-9e31e482f9fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446c42cfe52a91f9c2562d7da4e75dc4a296461b4c033c896b7c7f35c34f8cbc. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5600859bd9df11ce106fff9e0418248af4d7b7a0c33f450dace2fff59a2a512e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20400784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e96b31821124b55be1a8f8aa05094907591038b0c8594a6275ce39c595130. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20400785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0ddccc5b111f385c8783cf913e1a3c0375b83ab724b04a2a577ab73496a1bf. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USATL0200316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3ffbce2641213e4425132af3875cfb07db7f7883a6314549f63c9fdc7665d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USATL0200462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baebd07d3bad68b0fd7547d36cb3723133b5db4c477c8e3544686dc39d44c03. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USATL0200464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786a9cebbce95882df5867cca2e33025ed22e78e44d11c9c77cec7cb918ef309. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20110022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf575f4be1d15cf695f59d89db38be52b3b199ef22b4975072168fc4764f7c62d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT20503544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fe7761a6846cc51923fd2713a7759d56db10a0555503823913368ed687d709. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1712369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1348dd8f0d00340650d465de3eab2c821834cc2579c32f13e3a8ea920a0b21a0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1712371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7bbad08a99e99a0141bfd37d502e0692162d9a3b2983d24d98b23069b187b9. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1712372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b24b77d8014b5d0c4921982ed132d8595d15d028f9c32b39c309896a469b0a4. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBWC0410021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf494dcc84665fc287c9247da04305696a517424369ee56a15403a464590c8bed. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBWC0410023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125accd71cbca9aa53317c944b987028bb6c374ca03b16ce49a094c0dfb3ad50. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBWC0410024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4df2893ad9944e7adacb2483da15a72c021e5bdc8bacc61b48819f60b6afe3. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:58:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBWC0410030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a6b72d7317a764b238e81fc2740455e3eb221cfd78247f48074661820f14fd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBWC0410035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb930306d8813856869d2571124a6b4f88d2cae772a85379bd581da66b64efa2a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:34:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBPJ9802022.